Adds html files to .gitignore, because they are generated
-rw-r--r-- 50 .gitignore
-rw-r--r-- 35821 COPYING.txt
-rw-r--r-- 102021 Doxyfile
-rw-r--r-- 708 INSTALL
-rw-r--r-- 897 ISSUES.md
-rw-r--r-- 4152 README.txt
-rw-r--r-- 195 TODO.txt
drwxr-xr-x - doc
drwxr-xr-x - samples
drwxr-xr-x - snippets
drwxr-xr-x - src
drwxr-xr-x - tests